Effect of soil- and foliar-applied paclobutrazol on vegetative growth, flowering, fruit set and yield of oriental pear (Pyrus pyrifolia (Burm.) Nakai)

Rai, Nikita; Bist, L.D.

doi:10.1016/s0304-4238(05)80018-4

Cited by 11 publications

(5 citation statements)

References 9 publications

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“…Effects of gibberellin biosynthesis inhibitors and other vegetative growth retardants, on yield increase through better differentiation, higher fruit set or increase in mean fruit size were previously documented in many fruit species (Kulkarni, 1988;Wolstenholme et al, 1990;Greene, 1991;Rai and Bist, 1992;Yeshitela et al, 2004) and in olive (Antognozzi et al, 1989;Lavee and Haskal, 1993). In olive, gibberellins are the main growth regulators which affect vegetative growth.…”

Section: Discussionmentioning

confidence: 90%

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Adopting vigorous olive cultivars to high density hedgerow cultivation by soil applications of uniconazol, a gibberellin synthesis inhibitor

Avidan

Birger

Abed-El-Hadi³

et al. 1970

Span. j. agric. res.

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The high-density planting system recently adopted for olive, facilitates the use of efficient over-head mechanical harvesters. To accommodate the harvester only cultivars with restrained vegetative vigor can be used and managed to limit tree size while maintaining high productivity. Spray application of the 0.05% "Magic" (a commercial product containing 50 g L -1 uniconazol), or soil application of 2 and 4 g tree -1 "Magic", were tested to control the canopy size of fruitful vigorous cultivars to suit the high density hedgerow system and over-head harvesting. Two year old plants were chosen for the initial application. Soil application of 2 g "Magic" (0.1 g tree -1 uniconazol) caused a satisfactory balanced growth inhibition of the vigorous cvs. Barnea, Leccino and Picholine to suit the high density hedgerow system. Thus, a significant increase of the choice of cultivars to be used for over-head harvesting could be significantly increased. The use of vigorous cultivars treated with uniconazol for over-head harvesting started in commercial plantations in 2006. In some cases an increase of the annual dosage was required with aging of the trees. This required increase of the annual soil application of uniconazol with aging of the trees needs further observations. An increase in fruit production due to the optimal uniconazol treatment was apparent, though results were rather erratic. Still, production in treated orchards was at least within the country's average for each of the tested cultivars during the experimental years.Additional key words: gibberellins biosynthesis inhibitor; hedgerow orchard; over-head harvester. Resumen Adaptación de variedades vigorosas de olivo al cultivo en seto de alta densidad mediante aplicación al suelo de uniconazol, un inhibidor de la síntesis de giberelinasEl sistema de cultivo en seto de alta densidad, recientemente adoptado para el olivo, facilita el uso eficiente de cosechadoras cabalgadoras mecánicas. Para que la cosechadora pueda trabajar es necesario utilizar cultivares con poco vigor vegetativo manejados de manera que se limite el tamaño del árbol manteniendo alta productividad. Para controlar el tamaño de la copa de cultivares vigorosos a fin de adaptarlos al cultivo en seto con alta densidad de plantación y recolección con cosechadora cabalgadora, se probó la aplicación en pulverización de "Magic" al 0,05% (producto comercial que contiene 50 g L -1 de uniconazol), o la aplicación al suelo de 2 y 4 g de "Magic" por árbol, utilizando plantas de dos años para la aplicación inicial. La aplicación al suelo de 2 g de "Magic" (0,1 g uniconazol por árbol) en tres cvs vigorosos, Barnea, Leccino y Picholine, provocó una inhibición de crecimiento satisfactoria y equilibrada. Por tanto, esta técnica puede proporcionar un mayor número de cultivares adaptados a la recolección mecánica con cosechadoras cabalgadoras. El uso de cultivares vigorosos tratados con uniconazol para recolección con cosechadora mecánica se inició en 2006 en plantaciones comerciales. En algunos casos fue n...

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Section: Discussionmentioning

confidence: 90%

“…(Wolstenholme et al, 1990), apple (Malus × domestica (Greene, 1991), and pear (Pyrus sp.) (Rai and Bist, 1992;Asin et al, 2007). Application of triazols (paclobutrazol) to irrigated, large, adult olive trees of cvs.…”

Section: Introductionmentioning

confidence: 99%

Adopting vigorous olive cultivars to high density hedgerow cultivation by soil applications of uniconazol, a gibberellin synthesis inhibitor

Avidan

Birger

Abed-El-Hadi³

et al. 1970

Span. j. agric. res.

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“…Jindal and Chandel (1996) [5] reported that the application of paclobutrazol at 500 ppm once at full bloom and repeated at pit hardening stage noted the highest anthocyanin content (0.299 %) compared with control in plum. Anthocyanin in paclobutrazol treated trees may have improved due to more diversion of photosynthates towards the fruits (Rai and Bist, 1992) [8] .…”

Section: (Iv) Anthocyanin (Mg/100g)mentioning

confidence: 99%

Effect of soil applied paclobutrazol on chemical quality of Litchi (Litchi chinensis Sonn.) cv. rose scented

Pant¹,

Dimri²,

Rai³

2020

Int. J. Chem. Stud.

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Paclobutrazol is a plant growth retardant and triazole fungicide has been reported to be very effective for dwarfing a wide range of crops including litchi. It is a cell elongation and internode extension inhibitor that retards plant growth by inhibition of gibberellins biosynthesis. The effect of paclobutrazol at varying time intervals of litchi as soil drench application (1.00-4.00 g a.i. per meter canopy diameter) was investigated during 2016-18 in Pantnagar condition. The Chemical quality of litchi was significantly increased due to higher dose of paclobutrazol (2.0-4.0 g a.i./meter canopy diameter). Application of paclobutrazol at the rate 2.0, 3.0 a.i./tree through soil application method was noted to be more efficient in increasing Ascorbic acid, Total soluble solids, Total sugar, and Anthocyanin. The paclobutrazol applied at the rate 40 ml/tree was the most effective in increasing the Ascorbic acid (27.29 mg/100gm) followed by 60 ml/tree (27.15 mg/100g), while the minimum Ascorbic acid was recorded under control (25.37 mg/100gm). The application of paclobutrazol @ 40 ml/tree, the Titratable acidity of litchi tree was found to be minimum (0.49%) as compared to control (0.54 %). In different time intervals the D2 (October) estimated the minimum titratable acidity (0.51%) followed by D2 (October), while the maximum titratable acidity was noted under D3 (0.53%).The main purpose of this study is to focus upon contemporary information about paclobutrazol in litchi growth.

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“…The increased TSS to acid ratio might be due to increase in total soluble solids content and reduction in acid content of the fruits. The improvement in fruit quality with the application of growth retardants might be due to diversion of photosynthates, towards the fruits (Rai and Bist, 1992).…”

Section: Fruit Quality Characteristicsmentioning

confidence: 99%

Studies on Fruiting and Fruit Quality Characteristics in Tissue Cultured Plants of Pomegranate cv. Bhagwa

AL¹

2017

IJASR

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Effect of soil- and foliar-applied paclobutrazol on vegetative growth, flowering, fruit set and yield of oriental pear (Pyrus pyrifolia (Burm.) Nakai)

Cited by 11 publications

References 9 publications

Adopting vigorous olive cultivars to high density hedgerow cultivation by soil applications of uniconazol, a gibberellin synthesis inhibitor

Adopting vigorous olive cultivars to high density hedgerow cultivation by soil applications of uniconazol, a gibberellin synthesis inhibitor

Effect of soil applied paclobutrazol on chemical quality of Litchi (Litchi chinensis Sonn.) cv. rose scented

Studies on Fruiting and Fruit Quality Characteristics in Tissue Cultured Plants of Pomegranate cv. Bhagwa

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